* {
  margin: 0;
  padding: 0;
}

html, body {
  font-size: 16px;
  height: 100%;
}

html, body, img, input, ul, ol, dl, dt, dd, em, i, strong, h1, h2, h3, h4, h5, h6, div, span,
p, table, li, tr, td, th {
  padding: 0;
  margin: 0;
}

ul li, ol li {
  list-style: none;
}

a {
  text-decoration: none;
}

input {
  outline: none;
  border: 0;
}

img {
  vertical-align: top;
}

.flex {
  display: flex;
  align-items: center;
  justify-content: center;
}
